and immigration? we explore the challenges ahead in the next four years. >> ifill: and back with us again, for analysis, are mark shields and david brooks. >> woodruff: that's all ahead on tonight's "newshour." major funding for the pbs newshour has been provided by: ♪ ♪ moving our economy for 160 years. bnsf, the engine that connects us. and with the ongoing support of these institutions and foundations. and... this program was made possible by the corporation for public broadcasting. and by contributions to your pbs station from viewers like you. thank you. >> woodruff: for the first time in four years, president obama did not have to worry about re-election today. still, there was little time to savor tuesday's victory, in the face of a potential fiscal crisis at the end of the year. "newshour" correspondent kwame holman begins our coverage on this day after the election of 2012. >> reporter: mr. obama departed his hometown of chicago this afternoon for washington, his home for another four years. waiting for him: a still- divided congress now facing a critical lame duck session.